On and off I have had the Flash to Black issue with my LED ADC which has not bothered me to much. But suddenly the Desktop jumbled itself up vertically the 1st inch Left Hand strip with the apple logo "About this mac menu etc etc" ended up on the right hand side of the screen. Shutting down the system and restarting sorted it. Camera was flat but it's on charge now just in case it happens again, but a screen shot showed no issues.